Microstructure and electromagnetic wave absorption properties of RGO-SiBCN composites via PDC technology

Chaokun Song, Laifei Cheng, Yongsheng Liu, Mingxi Zhao, Fang Ye

科研成果: 期刊稿件文章同行评审

52 引用 (Scopus)

摘要

Herein, we demonstrate the incorporation of graphene oxide (GO) into silicoboron carbonitride (SiBCN) ceramics by polymer derived ceramics (PDCs) technology to improve dielectric and electromagnetic wave absorption capacity. Different amounts of GO content and annealing temperatures are used to optimize the permittivity of fabricated composites. Results show that RGO-SiBCN composite, with 10 wt% GO, delivers excellent electromagnetic reflection coefficient (RC) of − 34.56 dB and effective electromagnetic absorption bandwidth (EAB) of 2.46 GHz in the X-band. Enhanced performance of RGO-SiBCN composite is mainly due to the conductive loss and polarization loss. Furthermore, high-temperature annealing (1700 °C) resulted in precipitation of SiC nanocrystals and formation of nanoscale interfaces. Hence, RC and EAB of SiBCN reached − 46.73 dB and 3.32 GHz, respectively. The present study provides novel insight into fabrication and EMW absorption performance of SiBCN-based composites. It is believed that SiBCN-based composite possess superior microwave absorption property and have great potential in a wide range of applications.

源语言英语
页(从-至)18759-18769
页数11
期刊Ceramics International
44
15
DOI
出版状态已出版 - 15 10月 2018

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